Finding new addictive QTL for yield traits based on a high-density genetic map in hybrid rice
作者： Miao Zhang , Zheng-ping Zhou , Yu-yu Chen , Yong-run Cao , Chen-wei Deng
DOI: 10.1007/S10725-020-00669-2
关键词:
摘要: Rice is one of the most important food crops in world. To discover genetic basis yield components super hybrid rice Nei2You No.6, 386 recombinant inbred sister lines (RISLs) were obtained for mapping quantitative trait loci (QTL) responsible grain per plant, number panicles panicle and 1000-grain weight. Using whole genome re-sequencing, a high-density linkage map consisting 3203 Bin markers was constructed with total coverage 1951.1 cM average density 0.61 cM. A 43 yield-related QTL mapped to all 12 chromosomes, each explained 2.40–10.17% phenotypic variance, indicating that medium minor effect are high No.6. With positive effect, 28 out inherited from maintainer line (Nei2B). Nine loci, qGYP-6b, qGNP-6c, qNP-7, qTGW-1a, qTGW-5, qTGW-7, qTGW-10b, qTGW-10c qTGW-12 showed stable effects across multiple environments. Five these nine co-located previously reported QTL, four novel locus, qTGW-7 qTGW-12, firstly identified present study. Subsequently, validated using corresponding paired which differed only target region. The an effective tool confirming yield-associated traits. Newly detected provide new resource investigating genetics will accelerate molecular breeding rice.
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